Improvement in furnaces for heating scythes



UNITED STATES PATENT CEEICE.

LUCIUS C. PALMER, OF EAST WINSTED, CONNECTICUT.

Specification forming part of Letters Patent No. 34,589, dated March 4, 1862.

same, taken in the line 0c, Fig. 3; Fig. 3, a3

transverse vertical section of the same, taken in the line g/ y, Fig. l; Fig. 4, a horizontal section of the same, taken in the line ,e z, Fig. 2.

Similar letters of reference indicate corresponding parts in the several figures.

The object of this invention is to obtain a furnace by which the metal bars or stock used inthe construction of scythes may be heated more economically than hitherto. The fuel employed is bituminous coal.

To enable those skilled in the art to fully understand and construct my invention, I

will proceed to describe it.

A represents the body of the furnace, which may be composed of cast-metal plates a secured together by bolts b. The furnace is lined with fire-brick c, and it has a brick cap or top piece d.

B is the lire-chamber, and C the ash-box underneath it.

D is a horizontal flue which extends from the upper part of the lire-'chamber B to the back end of the furnace and communicates with a smoke-stack by means of an opening e. The brick cap or top piece d extends the whole length of the flue D, and the bottom of the iiue is also lined with brick c its entire length, as shown clearly in Fig. 2. The firechamber is supplied withfuel through doors or openings f at the front of the furnace, and the iire is supplied with air through the ashbox C, as indicated by the arrows in Figs. 2 and 3.

The bottom of the flue D has a central longitudinal vertical ledge or partition g attached. This ledge or partition is designed to separate the iiame and products of combustion as they pass through the flue, so that each side will be heated alike, but still a communication allowed between the two sides or parts. The ledge or partition g therefore does not extend the whole height of the flue D. It is not necessary that it should, as it will divide the flame and cause the latter to part each side of it. A ledge of very slight elevation will effect this result when placed in line with the center of the opening e of the smokestack.

The sides of the furnace are perforated with holes t', said holes being at the sides of the fire-chamber and flue. The holest'at one side of the furnace are not in line with those at the other side, but are in line with the centers of the spaces between them, as shown clearly in Fig. 4. The holes at both sides of the furnace admit of two sets of. workmen using the same fire. The bars to be heated are gradually removed from the holes farthest back in the iiue D to those in the sides of the fire-chamber, the forger working or operating on the bars as they are taken from the front holes. By this arrangement it will lbe seen that the flue D, or rather the heat thereof, is rendered subservient in heating the bars to be operated or forged, and the object of having the holes t at one side of the furnace out of line with those at the opposite side is to prevent the bars which are inserted into the furnace at either side from coming in contact with one another. This will be fully understood by referring to Fig. 4, in which the bars are shown by dotted lines.

The wall or lining of one side of the tireboX is provided with a recess G, which extends aeross the fire-box. The employment of this recess G in connection with the ledge g, forms an important feature of myimprovement. The arrangement of said recess G permits the bringing forward of the work to a position almost directly above the coals, where the work willbemore evenly heated, and where the edge of the scythe, by being presented toward the recess, will be protected from the direct action of the iiame, While that portion of the scythe where the steel edge and iron back unite will receive the best heat and the joint will be saved from the entrance of specks of coal and slate which are carried up with the products of combustion.

The ledge g enables me to support the Scythe above the bottom of the furnace and thus keep the scythe evenly heated on both sides. The ledge g also enables me to move the 2 `eine@ test part thereof, and as the bars are insertedY in both sides of the furnace, so that two sets of Workmen may use the fire at the same time,

the fuel is used in the most economical Way.

The Vertical ledge or partition g performs an important function, as it insures an equal heat at both sides of the ueD,anfd 'this is essential in consequence of both sidesof the flue being used. The process of forging they bars and forming them into scythes is the same as usual, and therefore does not require any special description.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

The arrangement of the recess G and ledge g With the fire-box B, iue D, and openings il, as and for the purpose herein shown and described. l

L. C. PALMER,Y

i Witnesses:

HIRAM PERKINS, JOHN CAMP. 

